Series UAG
Page 28
Nov 11, 2015
Electrical Wiring
General Requirements
Heaters are normally controlled by line voltage (120V) or low voltage (24V) thermostats. Line voltage
thermostats are wired directly while low voltage thermostats use a relay. In all cases, heaters must be
grounded in accordance with the
National Electric Code,
ANSI/NFPA 70
in the US, and the
Canadian
Electric Code,
CSA C22.1
in Canada, and must comply with all local requirements. Heaters may also be
controlled with a manual line switch or timer switch in place of the thermostat. Refer to Figure for
guidance on electrical wiring of heaters.
If any of the original wire as supplied with the heater must be replaced, it must be replaced with wiring
having a rating of at least 105°C temperature service and 600 volts capability.
Figure 25: Wiring Diagram Series UAG
24V STAT
HV
24V
V2
S1
GND
L1
IND
TH
V1
PSW
IGNITER
BURNER
SENSOR
24V
BLOWER
Green
Pink
Orange
Black
Blue
Yellow
Black
Yellow
Red
SWITCH
AIR
Purple
LAMP
RUN
Purple
Brown
L1
TRANSFORMER
NEUTRAL
120V
Blue
Red
Purple
Brown
Yellow
GAS VALVE
THERMOSTAT IS
MOUNTED EXTERNALLY
WIRING DIAGRAM Series UAG
Blue & Purple Wires are
Factory Jumpered,
Disconnect to
Wire in Thermostat
When connecting 120 VAC stat
the two blue wires used for the 24 Vac
stat must be connected internally.
MOUNTED EXTERNALLY
HV
GND
S1
V2
24V
DSI
V1
IND
L1
Black
Black
TH
PSW
BURNER
Yellow
Green
Pink
Blue
IGNITER
SENSOR
Blue
L1
NEUTRAL
TRANSFORMER
SWITCH
BLOWER
Black
Red
AIR
24V
Purple
Purple
Red
Blue
GAS VALVE
Yellow
Brown
120V
120 Vac STAT
THERMOSTAT IS
120 V Thermostat
NOTE: The post purge feature is not
utilized with the thermostat wired on the
120 Vac circuit. This option only works
if the heater is wired with the thermostat
on the 24 Vac circuit above.
Yellow
LAMP
RUN
Brown
24 V Thermostat
DSI
CE014
CE139
or Programmable CE053
